std::chrono::utc_clock (3) - Linux Manuals
std::chrono::utc_clock: std::chrono::utc_clock
NAME
std::chrono::utc_clock - std::chrono::utc_clock
Synopsis
Defined in header <chrono>
class utc_clock; (since C++20)
The clock std::chrono::utc_clock is a Clock that represents Coordinated Universal Time (UTC). It measures time since 00:00:00 UTC, Thursday, 1 January 1970, including leap seconds.
utc_clock meets the Clock requirements. It does not meet the TrivialClock requirements unless the implementation can guarantee that now() does not throw an exception.
Time point family
Defined in namespace std::chrono
template<class Duration> (since C++20)
using utc_time = std::chrono::time_point<std::chrono::utc_clock, Duration>;
using utc_seconds = utc_time<std::chrono::seconds>; (since C++20)
operator<<_(std::chrono::utc_time) performs stream output on a utc_time
(C++20)
from_stream_(std::chrono::utc_time) parses a utc_time from a stream according to the provided format
(C++20)
to_stream_(std::chrono::utc_time) outputs a utc_time into a stream according to the provided format
(C++20)
Member types
Member type Definition
rep signed arithmetic type representing the number of ticks in the clock's duration
period a std::ratio type representing the tick period of the clock, in seconds
duration std::chrono::duration<rep, period>, capable of representing negative durations
time_point std::chrono::time_point<std::chrono::utc_clock>
Member constants
constexpr bool is_steady true if the time between ticks is always constant, i.e. calls to now() return values that increase monotonically even in case of some external clock adjustment, otherwise false
[static]
Member functions
now returns a std::chrono::time_point representing the current point in time
[static]
to_sys converts utc_time to sys_time
[static]
from_sys converts sys_time to utc_time
[static]